Silly question ?

[Captain Mike]

I have replaced the head gasket on my seven and removed the manifold also, before setting the tappet clearance, I looked at the manifold and it appears there are only two inlet branches off the manifold on a four cylinder car, how does this work  as I can't set the tappets without identifying the inlet and exhaust valves ?
I must be missing something here

Explanations gratefully received

Cheers

Mike